81728278272
81,728,278,272 is an even composite number composed of five prime numbers multiplied together.
81728278272 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred sixteen divisors.
Prime factorization of 81728278272:
28 × 32 × 79 × 277 × 1621
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 79 × 277 × 1621)See below for interesting mathematical facts about the number 81728278272 from the Numbermatics database.
Names of 81728278272
- Cardinal: 81728278272 can be written as Eighty-one billion, seven hundred twenty-eight million, two hundred seventy-eight thousand, two hundred seventy-two.
Scientific notation
- Scientific notation: 8.1728278272 × 1010
Factors of 81728278272
Divisors of 81728278272
- Number of divisors d(n): 216
-
Complete list of divisors:
1 2 3 4 6 8 9 12 16 18 24 32 36 48 64 72 79 96 128 144 158 192 237 256 277 288 316 384 474 554 576 632 711 768 831 948 1108 1152 1264 1422 1621 1662 1896 2216 2304 2493 2528 2844 3242 3324 3792 4432 4863 4986 5056 5688 6484 6648 7584 8864 9726 9972 10112 11376 12968 13296 14589 15168 17728 19452 19944 20224 21883 22752 25936 26592 29178 30336 35456 38904 39888 43766 45504 51872 53184 58356 60672 65649 70912 77808 79776 87532 91008 103744 106368 116712 128059 131298 155616 159552 175064 182016 196947 207488 212736 233424 256118 262596 311232 319104 350128 384177 393894 414976 449017 466848 512236 525192 622464 638208 700256 768354 787788 898034 933696 1024472 1050384 1152531 1244928 1347051 1400512 1536708 1575576 1796068 1867392 2048944 2100768 2305062 2694102 2801024 3073416 3151152 3592136 3734784 4041153 4097888 4201536 4610124 5388204 5602048 6146832 6302304 7184272 8082306 8195776 8403072 9220248 10776408 12293664 12604608 14368544 16164612 16391552 16806144 18440496 21552816 24587328 25209216 28737088 32329224 32783104 35472343 36880992 43105632 49174656 50418432 57474176 64658448 70944686 73761984 86211264 98349312 106417029 114948352 129316896 141889372 147523968 172422528 212834058 258633792 283778744 295047936 319251087 344845056 425668116 517267584 567557488 638502174 851336232 1034535168 1135114976 1277004348 1702672464 2270229952 2554008696 3405344928 4540459904 5108017392 6810689856 9080919808 10216034784 13621379712 20432069568 27242759424 40864139136 81728278272
- Sum of all divisors σ(n): 239634799040
- Sum of proper divisors (its aliquot sum) s(n): 157906520768
- 81728278272 is an abundant number, because the sum of its proper divisors (157906520768) is greater than itself. Its abundance is 76178242496
Bases of 81728278272
- Binary: 10011000001110110001010001111000000002
- Hexadecimal: 0x1307628F00
- Base-36: 11JMWN40
Squares and roots of 81728278272
- 81728278272 squared (817282782722) is 6679511469305467305984
- 81728278272 cubed (817282782723) is 545904972084412818554458522779648
-
The
square root of 81728278272 is 285881.5808547309 -
The
cube root of 81728278272 is 4339.6774355889
Scales and comparisons
How big is 81728278272?- 81,728,278,272 seconds is equal to 2,598 years, 36 weeks, 5 days, 3 hours, 31 minutes, 12 seconds.
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To count from 1 to 81,728,278,272 would take you about five thousand, one hundred ninety-seven years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 81728278272 cubic inches would be around 361.6 feet tall.
Recreational maths with 81728278272
- 81728278272 backwards is 27287282718
- The number of decimal digits it has is: 11
- The sum of 81728278272's digits is 54
- More coming soon!
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